Automatic cut-off for glass-tube water-gages.



No. 755,456. PATENTED MAR. 22, 1904. W. COGBR. AUTOMATIC CUT-OFI' PORGLASS TUBE WATER GAGES.

APPLICATION FILED NOV. 5, 1903. N0 MODEL.

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UNITED STATES Patented March 22,1904.

PATENT OEETCE.

WALTER OOGER, OF BISBEE, ARIZONA TERRITORY.

SPECIFICATION forming part of Letters Patent No. 755,456, dated March22, 1904. Application tied November 5. 1903. Serial No. 179,980. (Nomodel.)

To a/ZZ whom it may concern:

Be it known that I, vWALTER OoeER, a citi- Zen of the United States,residing' at Bisbee, county of Cochise, and Territory of Arizona, haveinvented certain new and useful Improvements in Automatic Cut-OffGlass-Tube Vilater-Gages for Steam-Boilers, of which the` following isa-specificationy My invention relates to automatic cut-olf iglass-tubewater-gages for steam-boilers.

The object of the present invention is to provide an improvedautomatically-acting cut-olf valve for use in connection with glass-tubewater-gages,which will normally remain open and permit the rise and fallof the water in the glass tube of the gage, as usual in gages, and whichwill automatically close by the pressure of the steam should the glassbreak, thereby shutting off the steam-pressure and preventing any injuryor scalding of any person near the water-gage and making it convenientto shut off the steam-pressure without danger of injury in the regularway by the use of the olrdinary globe-valve used on gages of this c ass.

The invention consists in the improved form of valve as combined withthe water-gage, and particularly in the novel features and combinationsof parts set forth fully hereinafter and embodied in the appended claim.

In the accompanying drawings, Figure 1 is an exterior view of aglass-tube water-gage equipped with my invention and applied to aboiler; Fig. 2, a detail vertical section of the valve mechanism; Fig.3, a detail bottom View looking toward the valve-casing, the coupling orunion being removed; and Fig. 4, a detail perspective view of the valveand its casing, certain parts of the latter being brokenaway.

The numeral l represents a boiler provided with the fittings 2 and 3 andglobe-valve 4, as usual, by means of which the flow into the gage-glass5 can be controlled. On the littings 2 and 3 are screwed the nuts 6. Theconstruction being the same at both ends of the gage-glass, adescription of the parts at one end only will be given. The coupling orunion 6 has a suitable gasket 7, bearing against an internal flange 8,integral with the union 6. The valve shell or casing 9 is formed withinner and outer screw-threaded portions 10 and 11 and an intermediateintegral nut 12, the threaded portion 10 receiving the end of theglassgage-tube, and an internally-threaded nut 13 engaging with said portion10 and provided with a suitable gasket 14, while the outer threadedportion l1 is screwed into the coupling or union 6 and bears against theinternal flange or shoulder 8. Within the valvecasing 9 isa valve-seat14, and extending transversely of the casing is a bar 15, which is rigidwith the casing.

The numeral 16 designates avalve of asize to properly fit the seat 14and provided with a stem 17, slidable through the bar 15 and encircledby a coil-spring 18, which bears on a washer 19, held by a Cotter-pin20. The tendency of the spring is to keep the valve normally unseated,and its tension is such that the valve will not seat under ordinaryconditions. When, however, the gage-g'lass breaks, the pressure of thesteam entering the valvecasing automatically closes the valve againstits seat in opposition to the tension of its spring, and thus preventsthe steam from escaping through the broken gage-glass. This action takesplace immediately upon the breaking of the gage-glass.

The operation of both valves is the same. After the valves have closedthe globe-valves 4 can be closed at leisure in the usual manner. Theinvention is a safeguard against injury to any person near a gage-glassin case of the breaking thereof and is adapted to be applied to theordinary gage-glass.

I Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

In an automatic cut-off valve for glass boiler water-gages, thecombination with a boiler-fitting and a valve controlling the same, of aglass tube, a removable valve-casing which receives the end of the glasstube and has a shoulder to support the glass tube and having a bridgeacross its interior beyond the end of In testimony whereof I hereuntoaiix my' the glass tube, a spring-actuated valve having signature inpresence of tWo Witnesses.

a' stem slidable through the bridge said valve being adapted to seat,under pressure, in the WALTER `(/OGVER Valve-easing, and a coupling orunion detaeh- Witnesses:

ably connected to the boiler-fitting and to the GILES B. CAPRON,

valve-casing. W. D. KINSEY.

